Help with a Luke x-wing SW 21C Moc

Afternoon all,

need your collective help with a valuation on this one please.

Its a Luke X-wing pilot on SW 21 C cardback. Im having two issues valuing this,

1/ I can not seem to find any prices as a starting point. I have gone the Tracker data (graded and not) for last 5 years and can not find any prices for a 21 C. Equally, I can not find anything on ebay and facebook searches. Any other suggestion or knowledge?

2/ It has damage to the front front litho. The secret figure offer has been removed from the front (not by me) and someone has used a marker to touch up the damage. How would this effect any price?

Thank you advance for any help or suggestions you can give me on this valuation.

There's one on the tracker from 2014 for £136. You can probably round that up to £300 now, if it's genuinely that tough to find maybe even more, especially to a focus collector

Thanks for the reply and tracker information